Sorry I haven't read that book

I only know of two slot sizes ... 1/16" and 5/64"
1/16" being used for 3/4" t-molding
5/64" being used for 9/16" & 13"/16 and larger
When picking a slot cutter .... there's one key thing to remember....
Subtract 1/32" from the t-molding channel insert width.
For example ....
- 3/4" channel insert width is 3/32"
3/32" - 1/32" = 1/16" (correct slot cutter width)
- 13/16" channel insert width is 7/64"
7/64" - 1/32" = 5/64" (correct slot cutter width)
For your t-molding to fit correctly ... you'll need a t-molding with a channel insert width of 1/8" and to be honest ... I've never seen one that wide

Only thing I can tell you is to either use glue to hold it in place (poor solution if you ask me) ... or the better method is to fill the slot with wood putty, sand it level, buy the correct slot cutter, and re-cut it. (... if you have a variable random orbital sander ... it will make quick work of it ... I'd say an hour for the wood putty to dry, 20 minutes to sand it level and 5 minutes to re-cut the slot ... a simply fix

)